Accounts receivable over 90 days represents payment for care already delivered but still not collected three months later. Some balances remain recoverable. Others contain expired filing rights, incorrect adjustments, unresolved payer requests, invalid patient responsibility, or accounting entries that should not be in A/R at all. The first job is not to call every account. It is to determine what each balance actually represents.
A disciplined recovery project separates insurance and patient balances, validates claim history, identifies deadlines, and directs staff toward accounts with a supported path to payment. At the same time, the practice must fix the process that allowed claims to age. Otherwise, a cleaned 90-day bucket will rebuild within a few months.
What Does Accounts Receivable Over 90 Days Mean?
Medical accounts receivable is the money owed to a healthcare provider after services have been rendered and billed. An aging report typically divides open balances into periods such as 0 to 30, 31 to 60, 61 to 90, 91 to 120, 121 to 180, and more than 180 days.
The starting date matters. One system may age from the date of service, another from the original billing date, and a third from the most recent transaction. A rebilled claim can therefore look newer than the underlying encounter. Before comparing reports or setting a target, document the aging method and use it consistently.
A claim crossing 90 days does not automatically become uncollectible. It does become more urgent. Appeal and corrected-claim windows may be closing, evidence becomes harder to locate, staff attention moves to current claims, and patient contact information can become less reliable. The balance needs a decision, not another generic follow-up note.
How to Calculate the Percentage of A/R Over 90 Days
The basic calculation is:
A/R over 90 days percentage = A/R older than 90 days divided by total A/R, multiplied by 100.
If a practice has $420,000 in total receivables and $84,000 is older than 90 days, the result is 20 percent. That figure is useful only when both numbers follow the same rules. Decide whether credit balances, unapplied cash, patient payment plans, workers’ compensation, litigation accounts, and other exceptional categories are included.
Track days in A/R as a separate measure. The American Academy of Family Physicians explains the days-in-A/R calculation as total receivables divided by average daily charges after accounting for credits. A practice can have acceptable overall days in A/R while still carrying a concentrated old backlog, so both metrics belong on the dashboard.
What a Medical A/R Aging Report Should Show
A useful report must reach claim level. For each balance, include patient or account identifier, date of service, original submission date, payer, plan, provider, location, claim number, billed amount, allowed amount when available, payments, adjustments, current balance, denial or status information, last action, next action, responsible owner, and deadline.
Insurance balances
Insurance A/R includes claims pending adjudication, rejected claims that never reached the payer, denials, underpayments, coordination-of-benefits issues, requests for records, and secondary claims. Segment by payer and root cause. A total labeled insurance hides whether the solution is a corrected claim, appeal, enrollment correction, medical-record submission, or payment posting repair.
Patient balances
Patient A/R should contain only validated responsibility after payer adjudication. Before sending another statement, confirm that all insurance payments and adjustments were posted correctly, secondary coverage was billed, financial assistance procedures were followed where applicable, and the balance is not prohibited by contract or law. An account’s age is not proof that the patient owes it.
Credits and unapplied payments
Credit balances and unapplied cash distort aging. A payer check sitting in an unapplied account can make an open claim look unpaid. A credit on another encounter may need reconciliation or refund. Resolve these entries before estimating how much old A/R is collectible.
Why Medical Claims Age Beyond 90 Days
Clearinghouse rejections were missed
A transmission report is not the same as payer acceptance. A claim can leave the practice management system and fail at the clearinghouse because of an invalid member ID, missing NPI, formatting problem, or payer routing error. If staff does not reconcile acknowledgments, the payer may have no record of the claim while the filing clock continues to run.
Denials were touched but not resolved
Repeated notes such as called payer or claim under review create activity without progress. Effective denial management records the reason, required evidence, submission route, reference number, deadline, next follow-up date, and final result. Every touch should move the account toward payment or a documented disposition.
Documentation or authorization is missing
Payers may pend claims for medical records, orders, referrals, operative reports, proof of medical necessity, or authorization details. Recovery staff needs a defined route to the clinical or front-office team. Leaving the account in a payer-pending status without obtaining the requested material only makes the claim older.
Credentialing or enrollment is incomplete
A new provider, location, group tax ID, or reassignment may not be correctly connected to the payer. Claims can deny as out of network or provider not eligible. Compare the date of service with the enrollment effective date and payer confirmation. If several providers or sites share the pattern, handle it as a systemic enrollment issue rather than isolated claim corrections.
Patient responsibility is incorrect
Patient balances sometimes age because insurance processing was incomplete or posted incorrectly. Common examples include unbilled secondary coverage, deductible assigned to the wrong plan year, missing payer reversal, and contractual adjustments transferred to the patient. Validate the EOB or ERA before collection activity.
No one owns the next action
An account with no named owner and follow-up date is likely to remain open. High-performing workflows assign queues by payer, denial category, specialty, or aging bucket, then measure resolution. Working whichever account appears first on a report is not a recovery strategy.
Which Old Claims Are Still Recoverable?
Recoverability depends on evidence and deadlines, not age alone. A 140-day claim with proof of timely payer acceptance and an open appeal route may be stronger than a 95-day claim that was never submitted and has passed the initial filing limit.
- Actionable: The balance is valid, a deadline remains open, and the required correction or appeal is known.
- Pending evidence: Recovery may be possible, but the team needs a contract, payer acknowledgment, authorization, medical record, or other support.
- Escalation required: The issue is systemic, contractual, enrollment-related, or caused by payer processing and needs provider relations or management involvement.
- Not recoverable: The balance is invalid, unsupported, duplicated, contractually adjusted, past all available remedies, or approved for write-off under policy.
Do not keep uncollectible balances open to avoid a write-off. That inflates receivables and obscures current performance. A documented, authorized disposition is better than years of meaningless follow-up.
How to Prioritize a 90-Day A/R Backlog
Start with deadline risk. Claims close to a reconsideration, appeal, or corrected-claim cutoff should move ahead of accounts with longer windows. Then consider balance size, confidence in the amount, required effort, and whether the same problem affects multiple claims.
Group accounts by payer and root cause. Ten claims with the same fee-schedule problem are more efficiently researched and escalated together than handled across ten unrelated queues. High-volume small balances also deserve attention when they reveal a recurring upstream error.
A practical queue includes priority, current status, next action, owner, due date, and expected recoverable amount. Expected recovery should be evidence-based. Do not apply a generic percentage to every balance because specialties, payers, patient responsibility, documentation, and filing rights differ.
Step-by-Step Process for Recovering Aged Claims
1. Validate the balance
Reconcile charges, payments, ERA or EOB adjustments, refunds, reversals, secondary billing, and unapplied cash. Confirm the claim belongs to the correct patient, payer, provider, and date of service. For suspected short payments, compare the actual result with expected reimbursement. The Swift guide to medical billing underpayments explains that calculation in detail.
2. Check submission and appeal deadlines
Initial filing, corrected claims, reconsiderations, and formal appeals can follow different deadlines. Review the payer contract, provider manual, denial notice, portal instructions, and applicable program rules. For Medicare fee-for-service claims, use current CMS provider appeal guidance rather than relying on a general commercial-payer workflow.
3. Identify the root cause
Determine whether the account is waiting on payer processing, denied, rejected, underpaid, missing documentation, affected by enrollment, assigned to a patient, or posted incorrectly. Read claim acknowledgments and remittance codes. A status label such as in process is not enough when the payer’s normal adjudication period has passed.
4. Choose the correct recovery action
The action may be a clean resubmission, corrected claim, reconsideration, formal appeal, record submission, coordination-of-benefits update, enrollment escalation, payment dispute, secondary claim, or patient outreach. These routes are not interchangeable. Use the channel required by the payer and retain confirmation.
5. Document and track the outcome
Record the submission date, method, supporting documents, payer reference number, representative, expected response date, next follow-up, and result. Separate dollars identified, actively pursued, approved, paid, and written off. Recovery is complete only when the payment is received and reconciled.
Example of Recovering a Claim Over 90 Days
Consider a $2,400 outpatient procedure claim at 108 days. The billing system shows no payment and no denial. The claim note says it was submitted eight days after service.
The analyst checks the clearinghouse history and finds a rejection for an invalid subscriber group number. Staff corrected the demographic record later, but nobody resubmitted the claim. The payer’s initial filing period appears to have expired.
Instead of writing off the balance immediately, the analyst gathers the original transmission record, rejection acknowledgment, updated insurance card, eligibility response for the date of service, corrected claim, and internal correction history. The payer instructions are reviewed to determine whether a late filing reconsideration accepts proof of attempted timely submission. The packet is filed through the required channel and assigned a follow-up date.
The example does not guarantee payment. It shows why claim-level evidence matters. A basic aging report would label the account over 90 days. The history reveals the actual problem, available evidence, and decision path.
A Practical 30-Day A/R Cleanup Plan
Days 1 to 5: Export and reconcile the full aging inventory. Separate insurance, patient, credit, and unapplied balances. Confirm the aging basis and calculate days in A/R plus the percentage over 90 days.
Days 6 to 10: Segment by payer, root cause, age, deadline, provider, location, and balance. Identify the largest concentrations and create recovery queues with named owners.
Days 11 to 20: Work deadline-sensitive and high-confidence claims. Submit corrections, appeals, records, and payer escalations with complete evidence. Reconcile obvious posting errors and process approved dispositions.
Days 21 to 30: Measure payments, approvals, pending responses, and write-offs. Report recurring root causes and assign corrective actions to registration, authorization, coding, credentialing, claim submission, payment posting, or patient billing.
The first month should produce a verified inventory and a controlled workflow. It should not promise that every payer will resolve every old claim within 30 days.
How to Prevent Claims From Reaching 90 Days
Reconcile clearinghouse and payer acknowledgments daily. Establish an expected response window by payer and investigate claims that exceed it. Route denials by reason and due date, not only by dollar amount. Track requests for records and prior-authorization evidence to completion.
Review the 61-to-90-day bucket every week. That is where the practice can still intervene before another group of claims moves into old A/R. Dashboards should show movement between buckets, new inflow, resolved balances, write-offs, and root causes. A shrinking total balance can hide poor performance if new claims continue aging at the same rate.
Use findings to repair upstream processes. If claims reject for demographics, adjust registration controls. If authorization denials dominate, connect scheduling and authorization tracking. If payments are posted incorrectly, improve ERA rules and exception review. Full revenue cycle management prevents A/R problems by connecting these teams.
When to Outsource Aged A/R Recovery
Outsourcing can make sense when internal staff must choose between current claims and a large backlog, deadlines are approaching, specialist knowledge is missing, or an old vendor left incomplete notes. It can also help during acquisitions, EHR transitions, provider turnover, payer conversions, and rapid growth.
Ask a prospective partner how it validates balances, prioritizes accounts, protects patient information, documents actions, handles payer portals, coordinates with clinical staff, and reports outcomes. Confirm whether fees apply to all collections or only incremental recovered amounts, and define which dates and balance types are included.
Reports should show beginning inventory, additions, corrections, appeals, pending claims, recovered cash, adjustments, credits, write-offs, remaining balance, and root cause. A vendor that reports only accounts touched is measuring effort, not results.
How Swift Medical Billing Handles Old A/R
Swift Medical Billing starts by validating the inventory. Our team separates payer balances, patient responsibility, credits, unapplied cash, denials, underpayments, and posting errors, then identifies the claims with a supported route to recovery. Work is prioritized by deadline, financial value, evidence, and recurring payer patterns.
Swift’s A/R recovery services can be used for a defined backlog or coordinated with ongoing billing. The goal is not only to work old claims. Findings are traced back to the process that created them so the same rejection, denial, enrollment issue, or posting error does not refill the aging report.
If your practice has a growing accounts receivable over 90 days balance, request an A/R review. We can help identify what remains recoverable, organize the next actions, and build controls that protect current cash flow.
Frequently Asked Questions
What percentage of A/R should be over 90 days?
The appropriate target depends on specialty, payer mix, patient balances, and how the report is calculated. Many practices use a low percentage as a performance goal, but the trend and composition matter more than one universal number. Define the calculation and investigate increases promptly.
Can old A/R claims over 90 or 120 days still be recovered?
Yes, some can. Recovery depends on claim history, payer rules, filing and appeal rights, available documentation, accurate enrollment, and whether the balance is valid. Age alone does not determine collectibility.
What is A/R follow-up in medical billing?
A/R follow-up is the structured work used to resolve unpaid balances. It includes checking claim status, correcting rejections, responding to payer requests, appealing denials, disputing underpayments, billing secondary coverage, validating patient responsibility, and documenting the final outcome.
How do you calculate days in A/R for a medical practice?
Calculate average daily charges for a defined period after applicable credits, then divide total receivables by that daily amount. Use consistent periods and rules so changes reflect operational performance rather than a different calculation.
What is the difference between A/R management and denial management?
Denial management focuses on claims the payer has denied. A/R management covers every outstanding balance, including pending claims, clearinghouse rejections, underpayments, secondary claims, patient balances, credits, and posting problems. Denials are one important part of the larger A/R workflow.
